The Kellys are all over Ireland; the name originates from at around 10 different and unrelated ancient clans or septs. These include O'Kelly septs from Meath, Derry, Antrim, Laois, Sligo, Wicklow, Kilkenny, Tipperary, Galway and Roscommon.

O'Kelly comes from the Gaelic O Ceallaigh, meaning "descended from Ceallach," an Irish chieftan. “Ceallach” means war or contention. It is an ancient first name that is no longer used as a first name in Ireland. However, Kelly is a popular first name for women in the U.S.READ THE WHOLE STORY OF THE KELLY CLAN! CLICK HERE
3. O'Sullivan – the hawkeyed ones

Kellys may have bright heads, but O’Sullivans have hawk-like eyes.

The O'Sullivans or Sullivans are one of the most populous of the Munster families. In Irish, O'Sullivan is O'Sileabhin, and there is no doubt that origin of the name comes from the word sil (eye), though whether it is to be taken as "one-eyed" or "hawkeyed" is in dispute among scholars.

Originally lords of the territory around Cahir, County Tipperary, in the 12th century, they migrated to what is now West Cork and South Kerry, where the name is still very prominent.

The name Walsh is one of the most common of the Norman associated names found in Ireland. It seems to have been the name used by the many different groups of Welsh people who arrived in Ireland with the Normans during the 12th century.

They might not be warriors themselves, but at least O’Connors descend from them!

The O'Connor name, with its varied spellings, doesn't spring from a common source. The name arose in five areas of Ireland: Connacht, Kerry, Derry, Offaly and Clare and split into six distinct septs.

The most prominent sept is that of the Connacht O'Connors who gave us the last two High-Kings of Ireland: Turlough O'Connor (1088-1156) and Roderick O'Connor (1116-1198). They trace their heritage and name from the Irish "Ua Conchobhair," meaning from Conchobhar, a king of Connacht.READ THE WHOLE STORY OF THE O'CONNOR CLAN! CLICK HERE

9. O'Neill – from a champion, Niall of the Nine Hostages

The O'Neill family traces its history back to 360 A.D. to the legendary warrior king of Ireland, Niall of the Nine Hostages, who is said to have been responsible for bringing St. Patrick to Ireland.

Niall is also said to have been incredibly fertile – he has 3 million descendents worldwide.

“O’Neill” is derived from two separate Gaelic words, "Ua Niall," which means grandson of Niall, and "Neill" meaning "champion."

Ireland’s O'Neills were known by the nickname "Creagh," which comes from the Gaelic word "craobh" meaning branch, because they were known to camouflage themselves to resemble the forest when fighting the Norsemen. Crafty fellows, those O’Neills.READ THE WHOLE STORY OF THE O'NEILL CLAN! CLICK HERE

10. O'Reilly - ?

The O'Reillys round out the top 10 most popular names in Ireland.

Their family name is derived from the Gaelic "O'Raghailligh," meaning descendants of Raghaillach.

The O'Reillys were the most powerful sept of the old Gaelic kingdom of Breffny (Cavan and the surrounding counties), and the family is still prominent in the area.